Mio Kondo

The four-electron oxidation of water (2H2O → O2 + 4H+ + 4e-) is considered the main bottleneck in artificial photosynthesis. In nature, this reaction is catalysed by a Mn4CaO5 cluster embedded in the oxygen-evolving complex of photosystem II. Ruthenium-based complexes have been successful artificial molecular catalysts for mimicking this reaction. However, for practical and large-scale applications in the future, molecular catalysts that contain earth-abundant first-row transition metal ions are

Surface-specific: Coordinatively immobilized monolayers (CIMs) of fluorescent dyes were fabricated on specific single-crystal surfaces of porous coordination polymers (PCPs) (see picture). This approach enables the fabrication of functional PCP crystal surfaces with precisely controlled fluorescent gating and sensing properties. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are

Molecule-based heterogeneous photocatalysts without noble metals are one of the most attractive systems for visible-light-driven CO₂ reduction. However, reports on this class of photocatalysts are still limited, and their activities are quite low compared to those containing noble metals. Herein, we report an iron-complex-based heterogeneous photocatalyst for CO₂ reduction with high activity. The key to our success is the use of a supramolecular framework composed of iron p

The development of artificial molecular catalysts for CO₂ reduction is the key to solving energy and environmental problems. Although chemical modifications can generally improve the catalytic activity of this class of compounds, they often require complicated synthetic procedures. Here, we report a simple procedure that dramatically enhances electrochemical CO₂ reduction activity. A one-step counteranion-exchange reaction increased the solubility of a commercially availabl

In this contribution, we present a method to selectively synthesize crystal polymorphs of [Zn2(bdc)2(dabco)]n (1) and [Zn2(bdc)2(bpy)]n (2), either the pillared 2D square-grid nets (1sql or 2sql) or the pillared 2D Kagomé nets (1kgm or 2kgm) by simply changing the crystallization temperature.

The construction of highly active molecular catalysts for the water oxidation reaction (2H2O → O2 + 4H+ + 4e−) based on earth-abundant and low-toxic metal ions is strongly required to develop a sustainable artificial energy cycle. Biorelevant first-row transition metal ions, manganese, copper, and iron ions, are attractive candidates for such catalysts because of their ubiquitous nature and high affinity for oxygen atoms. In this highlight review, we introduce recent progress in the development

1-Ferrocenylethynylanthraquinone (1-FcAq), which is a donor (D)-acceptor (A) conjugated compound consisting of a ferrocene (Fc) acting as a donor, an anthraquinone (Aq) acting as an acceptor, and an ethynyl linker, undergoes a cyclocondensation reaction with strong organic acid, and forms 2-ferrocenyloxodihydrodibenzochromenylium salts ([1-FcPyl](+)X(-) where X = TFSI, TfO, PF(6), and BF(4)). [1-FcPyl](+) were also characterized as conjugated donor-acceptor compounds, and electrochemical propert

We show a new approach to control the self-assembly of paddle-wheel dimers by intermolecular multipoint arene–perfluoroarene interactions. Two types of complexes, I-shaped Rh2(O2CCF3)2(L)2(3-pentanone)2 (1) and cross-shaped Cu2(L)4(THF)2 (2) were synthesized to afford 1D chain and 2D square-grid sheet structures, respectively.

Flächenspezifisch: Koordinativ immobilisierte Monoschichten (CIMs) fluoreszierender Farbstoffe wurden auf spezifischen Einkristalloberflächen poröser Koordinationspolymere (PCPs) erzeugt (siehe Bild). Der Ansatz ermöglicht die Herstellung von funktionellen PCP-Kristalloberflächen mit präziser Steuerung von Fluoreszenz-Gating und Sensoreigenschaften.

Just add a proton: The cyclocondensation of 1-aryl ethynylanthraquinones in the presence of a strong organic acid proceeds almost quantitatively to give oxodihydrodibenzochromenylium compounds (see scheme for a 1-ferrocenyl derivative; blue C, red O, purple Fe). Expansion of the π-conjugated system of the starting anthraquinones causes a lowering of the π* orbital and promotes intramolecular electron transfer. Supporting information for this article is available on the WWW under http://www.wiley

Both porous and nonporous structures are formed by crystals of donor–acceptor (D–A) compound 1,4-bis(ferrocenylethynyl)anthraquinone. The guest-incorporating porous and guest-free nonporous structures can interchange instantly and reversibly by desorption and adsorption of guest molecules, which cause alternation of D–A and D–A–A arrangements in the one-dimensional columnar structure (see picture). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/cont

Small-molecule conversions involving multielectron transfer processes enable the conversion of earth-abundant materials into valuable chemicals and are regarded as a solution for environmental and energy shortage problems. In this context, the development of artificial catalysts that promote these reactions is an important research target. In nature, metalloenzymes that contain multinuclear metal complexes as active sites are known to efficiently catalyze reactions under mild conditions. Therefo

The incorporation of active sites into metal-organic frameworks (MOFs) or porous coordination polymers (PCPs) is an attractive way to functionalise these materials. However, the methodology to organise substitution-inert metal-based secondary building units (SBUs) with active sites into MOFs or PCPs via coordination driven self-assembly is severely limited. In this study, we successfully assembled substitution-inert paddle-wheel Rh(II) dimers to afford three novel porous frameworks, Rh2(ppeb)4(T

Structural transformability accompanied by molecular accommodation is a distinguished feature of porous coordination polymers (PCPs) among porous materials. Conventional X-ray crystallography allows for the determination of each structural phase emerged during transformation. However, the propagation mechanism of transformation through an entire crystal still remains in question. Here we elucidate the structural nature of the spatial transient state, in which two different but correlated framewo